Finding the Fourth Proportional to 9,374.37, 12,939.41 and 5,398.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,374.37 : 12,939.41 = 5,398.28 : x
2. Step 2: Convert to fraction form
   9,374.37/12,939.41 = 5,398.28/x
3. Step 3: Cross multiply
   9,374.37x = 12,939.41 × 5,398.28
4. Step 4: Simplify right side
   9,374.37x = 69,850,555.54
5. Step 5: Solve for x
   x = 69,850,555.54/9,374.37
6. Step 6: Final answer
   x = 7,451.23